Assig-n



(N0 Model.) 2 Sheets-Sheet 1'.

' S. B. SMITH.& E.'MYERS.

SAW MILL FEED MECHANISM.

No. 270,140. Patented Jan. 2, 1883,

[Hm-7J7 [ET 5 5 H177 Us] I? 51771715 14/ [55/ Edward H 5]5 C2 l (No Model.) 2 Sheets-Sheet 2.

S. B. SMITH 8; E. MYERS.

SAW MILL FE BD MEGHANISMJ v No. 270,140. Patented Jan. 2, 1883.

' smaller diameter .tion of the movement in of the following parts: A pulley,

placed in the condition UNITED STATES PATENT Denice.

SAMUEL SMITH AND EDWARD MYERS, OF CINCINNATI, OHIO, ASSIGN- OBS TO SMITH, MYERS 827 SGHNIEK, OF SAME PLACE.

SAW-MILL FEED MECHANISM.

SPECIFICATION forming part of Letters Patent No. 270,140, dated January 2, 1883,

Application filedAugust 11, 1882. (No model.)

To all whom it may concern.-

Be it known that we, SAMUEL B. SMITH and EDWARD MYERS, both of Cincinnati, Hamilton county, Ohio, have invented a new and useful Improvement in Saw-Mill Feed Mechanism, of which the following is a specification.

Our invention relates to an improved feed and gig movement for circulansaw-mill feed mechanism of exceptional efficiency, compactness, and durabilit 1 In the accompanying drawings, Figure l is a perspective view, and Fig. 2 is a top view, of portions of a circular-saw mill in which our movement is represented in condition for gigging back. Fig. 3 is a rear elevation of the movement in the same condition. Figs. 4 and 5 are respectively a top view and a rear elevacondition for feeding. Figs. 6 and 7 are respectively a top view and a rear elevation of the movement in its inter mediate or inactive condition.

The following parts may be of the represented or of any suitable or customary form, to wit: bed-sills A 13, track 0, carriage E, wheels D F, steps G on inverted track H, and inverted rack I. I

J may represent any suitable frame for support and attachment of the various operative parts of the saw K and of the'feed and gig movement, which latter is for the most part composed of V friction-gearing, and consists L, upon the saw-arbor M communicates by belt N with a larger pulley, 0, upon a shaft, P. The arbor M has a chaml'ered wheel, Q, and the shaft P a pair of interiorly-chamfered disks, R R, of I than said wheel Q. Ashaft, S, armed at its front end with pinion T, which meshes in the rack I, is journaled at its rear extremity in a hanger, U, which is pivoted at u to the frame, and at its free extremity to a rod, V, which connects it with an arm, W, on the rear end of a shaft, X, which passes through or under the bed-sills, and is provided at its front end with a handle, Y. The shalt S has chamfered wheel Z, which, when the parts are shown in Figs. 4 and 5, impinges byits chamfered surfaces on the Constantly impinging against wheel Z is an interiorly chamfered wheel, formed by two disks, a a, united by nutted bolts b. The said wheels Z and act operate alternately as drivers one of the other, according to whether they are thrown into position Figs. 4 and 5, or position Figs. 2 and 3, in thelatter case being driven by the wheel Q at the rapid rate suitable for gigging back, and in the former case being driven in the opposite direction by the much more slowly moving wheel R R for feeding the carriage to the saw-action. When in the interme diate position shown in Figs. Sand 7, in which neither wheel Q nor wheel It R is impinged upon, both wheels Z and a a motion of the carriage takes place. The lateral resilience of the disks which respectively compose the internally-chamfered wheels R R and a aenables them to grasp with sufficient traction to communicate motionthe single diskwheels Z and Q, when brought in contact with them, with very little exertion on the. part-of the sawyer.

In order that the wheel a ashall constantly are at rest and no 6 bear against the wheel Z, the former has its 7 shaft p journaled in arms d (1, which are pivoted t0 the frame ate e, and which, by extending obliquely upward in the manner shown, enable the gravity of the wheel a. a to keep it in contact with the wheel Z. As fered surfaces wear they may have their traction restored by tightening the bolts b.

The pulleysL and 0 may be of the stepped form, as represented, so as to enable the sawthe cham- 8o yer to change at discretion the relative speeds 8 of the feeding and gigging movements. Over friction-feed that depends wholly on cylindrical pulleys our above-described arrangement of alternate single V and groove pulleys has a number of decided advantages. the entire suit of friction-wheels may be made wholly of iron or other hard metal which is practically indestructible, so that for communicatingtheexceedingly-rapid giggingorretrograde movement of the carriage ting-surfaces are wholly metallic. There is a great saving, both incost of manufacture and in room taken up, compared to the cylindrical or so-called flat friction-feed. The slippage For example,

the transmit- 5 50 corresponding surfaces of the wheel RR. being is less, and, much less lateral pressure required, there is less liability to heat up and ,less consumption of power. The sawyer is relieved of much of the severe labor required to hold the flat feed in effieieuteoutact, espeeially in rapid work.

We elaiufas new and of our invention- The feed and gig movement for circular-saw mills, consisting of pulley L upon the sewerbor, having belt-connection N with a larger pulley, 0, upon shaft P, the chamfered Wheel Q on said arbor, the cliamt'ereri disks R R on said shaft P, the ehamfered disks to a 0n gravi' tating shaft 19, and the charnfered wheel Z on the carriage-driving pinion-shaft, whose free extremity is journaled in hanger U, connected by rod V, arm W, and shaft X with lever or handle Y, substantially as set forth.

Intestimony of which invention we hereunto set our hands. SAlVlL. B. SMITH.

EDWARD MYERS.

Attest:

SAML. S. CARPENTER, GEO. H. KNIGHT. 

